A window through the walls of our classroom. This is an interactive learning ecology for students and parents in my Pre-Cal Math 20S class. This ongoing dialogue is as rich as YOU make it. Visit often and post your comments freely.

Tuesday, September 16, 2008

Today in class Dr. Eviatar gave us Exercise 10: Factoring Difference of Squares questions 1-20. DONOT do questions 8, 9, 12 -16 and 18. If you weren't in class today and you forgot your textbook in your locker here are the questions:

1.a.) x² - 16b.)36t² - 1

2.a.) 4a² - b²b.) 8c² - 72

3.a.) 81 - (x + 7)²b.) (x - 1)² - (x + 1)²

4.a.) x^8 - y^12b.)4x² - 1

5.a.) 4m² - 25y^4b.) 121x² - 196y²

6.Simplify: [(3x²)(4x³)]²

7.Simplify: x³ + x³ + x³

10.How many rectangles occur in this figure?

11.Solve for x:a.) x / 2 + 1= x / 3 - x - 1 / 2

b.) (x + 2 )(x + 3) = x² + x

17. If the area of a rectangle is (x³ - 1) square units and one side is (x + 1) units, what is the length of the other side?